Locomotive exhaust apparatus.



July 16,1918.

EETS-SHEET 1.

Patented A. G. HENTZ.

LOCOMOTIVE EXHAUST APPARATUS.

APPLICATION FILED OCT. 13, I916. 1,272,662.

A. G. HENTZ.

LOCOMQTIVE EXHAUST APPARATUS.

APPLICATION FILED 00?.13. mm.

Patented July 16, 1918.

2 SHEETSSHEET 2 wuemtocc atto'ww 11 ALBERT GORDON HENTZ, OF COLLINWOOD, OHIO, ASSIGNOR OF TWO-THIRDS TO B. B. MILNER, OF.NEW YORK, N. Y.

' LOCOMOTIYE EXHAUST APPARATUS.

Specification of Letters Patent.

Patented July 16, 1918..

Application filed October 13, 1916. Serial No. 125,350.

To all whom it may concern.-

Be it known that I, ALBERT GORDON Hnnrz, a citizen of the United States, and residing at Collinwood, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Locomotive Exhaust Apparatus, of which the following is a specification.

This invention has reference to exhaust apparatus such as is used in locomotives and has for its primary object the provision of mechanism of the character referred to which will, with a given amount of opening, materially increase the draft, or which, in order to secure a pre-determined amount of draft, will not require so much restriction of the steam escape opening-as is commonly the case and which in consequence will materially reduce the back pressure on the locomotive pistons Another object of this invention is the provision of an exhaust apparatus inwhich there shall be employed a series of outlet openings connected to a common chamber but arranged to discharge the exhaust steam in a plurality of jets so disposed as to leave some clearance space between adjacent jets just at the point of discharge but to insure a junction of the discharging ets 'wlthin the stack at some distance above the point of discharge.

A further object of this invention is a reduction of noise incident to the operation of a locomotive exhaust nozzle.

Still another object of the invention is the provision of an exhaust apparatus having a plurality of jets arranged so -that the gas or escaping products of combustion from the fire may be drawn in between the jets at a point beyond the plane of discharge and entrain with the escaping steam upon the inside and throughout the mass as well as upon the outside whereby the available entraining area of the steam is increased to such an extent that'I have found in some cases over double the draft can be obtained with a nozzle of this type that can be obtained with other arrangements of nozzle, other conditions being the same.

Still another object of this invention. is the provision of an exhaust apparatus of the character referred to employing a plurality of steam jets and in which the abrading or destructive action of the cinders carried with the escaping gases is altogether avoided, the

entraining action of the device taking place beyond or above the top surface of the discharge nozzle, so that the cinders will not I cause any wear on the retaining walls or otherparts of the mechanism, the only part liable to be abraded or worn being the very top surface of the nozzle which can be easily and cheaply protected by any suitable detachable or renewable wear plate.

In order that my invention may be better understood, 1 have illustrated the same in preferred form in the accompanyingdrawings wherein: Figure 1 is a transverse sectional view of the front end of a locomotive through the nozzle and stack thereof; Fig. 2 is a partial plan View of the nozzle itself; Fig. 3 is a sectional View taken on the line III-III of Fig. 2; Fig. 4 is an elevation of a part used to separate adjacent discharge outlets; Fig. 5 is a sectional view on the line V-V of Fig. 4, and Fig. 6 is a small size View, in section, indicating the action of the several discharge jets.

Referring now more particularly to Fig. 1, it will be seen that 1 have therein indicated the smokebox end of a locomotive boiler marked 7, with the stack 8 in section, and the cylinders 9 and valve chest 10 on opposite sides leading to the discharge passages 11 which unite within the main chamber 12 of a nozzle device.

The nozzle proper, for convenience of manufacture, I have made with a base part 13 which carries a cylindrical portion 14, the upper end of which is closed at the center by a kind of plug or head wall 15 supported in position by a plurality of spacing members 16 shown more particularly in Figs. 3, 4, and 5, the spacing members 16 being arranged so that they will not only hold the head 15 in place but will provide exhaust apertures 17 in a series arranged around the head 15 and between the latter and the walls of the cylindrical chamber 14.

Referring to Fig. 6 it will be seen that the steam will discharge upwardly through the apertures 17 in a series of jets 18 that although spaced quite a distance apart at the outlet opening of the nozzle, as shown at 19,'will gradually approach each other as they expand at the same time that the discharging column of steam expands as a whole, and will therefore serve to substantially fill the interior of the stack 8 at a point a considerable distance above the point of escape on the nozzle. Theresult of this arrangement is that there are apertures provided between adjacent columns of escaping steam through which; the gases and cinders and other products of combustion can be drawn, as shown by the arr.owsin Fig. 1, into the interior of the ascending column of steam and become entrained with the steam at a point above the head or plug 15, this being accomplished without sub ecting the nozzle itself or any of its interior surfaces to the abrading or cutting action of the smoke or einders and effectively serving to draw along vwiththe discharging steam a large body of the gases and products of combustion so as to produce a strong draft with a minimum of back pressure, and from the effective commixture within the stack, to reduce also the noise and disturbance of the stack discharge.

It will beevident that the number, size, shape and arrangement of theseveral members 16 and of the ports or separate discharge apertures is not limited to that shown on the drawing but maybe varied as the conditions of service require to produce the best and most, efiective results.

I claim:

1. A locomotive exhaustdevice comprising in combination a nozzle, a central head of smaller diameter than the interior of the nozzle located in the discharge end thereof, and a plurality of spaced members arranged about said head and between vthe head and the wall of the nozzle, the upper ends of the central head of smallerdiameter than the exhaust nozzle anda plurality of spaced members arranged thereabout, said discharge device being located in the discharge end of the nozzle, and the upper ends of the head and the spaced members being sub-- stantially flush with the end of the nozzle, said spaced members being so formed that they serve in conjunction with said nozzle and head to dischar e the steam in jets uniting ata point a su stantial distance above the end of the nozzle thereby providing lateral spaces above the nozzlecommunicating with the central space within the jets for the entrainment of the products of combustion;

In testimony whereof, I have hereunto signed my name.

A. GORDON HENTZ. 

